Calendar-chart.



N0.a49,251.q PATBNTBD APR.2,1907.

J. B. LINDSBY.

A* CALENDAR CHART.

APPLICATION HLBD MAR. 15, 1906.

M22/Wvg@ ATTORNEYS THE NuRRls PETERS co., WASHINGTON, l:4 c,

UNITED STATES PATENT OFFICE.

CALENDAR-CHART.

Specification of Letters Patent.

Patented April 2,1907.

Application filed March 15,1906. Serial No. 306,156.

T ttf/Z when@ t may concern:

. Be it known that I, JOSEPH BUTTON LIND- snr, a citizen of the United States, and a resident of Lockwood, in the county of Dade and State ot Missouri, have invented a new and Improved Calendar-Chart, of which the following is a full, clear, and exact description.

The purpose of the invention is to provide a calendar device or chart so arranged that the number of days from a given date to any other date in the past or in the lfuture and maturity dates can be readily and expeditiously found and accurately read in days.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter Jfully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specilication, in which similar characters of reference indicate corresponding parts in all the gures.

Figure l is a plan view of the improved chart device, and Fig. 2 is a section through the same.

In carrying out the invention twelve charts or leaves A are provided, one for each month of the year, the chart for the current month having the name of that month at the top of the chart in the eXtreme outer righthand and lett-hand columns, the names of the other months oli' the year being in parallel columns. varying in their arrangement relatively to the outer or initial columns according to the names of the months appearing in said initial columns.

The chart illustrated and that which will be described is for the month of October. T lie-chart is placed upon and is secured to a board B, the attachment being made in such manner that the charts may be removed when desired.

At the central portion of the chart A a i space a is provided, which may be termed a working space, and said space extends 'from the top to the bottom of the chart. In the upper portion of said space figures are printed at equal distances apart in a longitudin al column, which 'figures represent the days oi' the month, and said igures read from 3l at the top consecutively to 1 at the bottom, included. Thelast figure in saidcolumn is at about the central portion of the said space a. An aperture a is produced in the space a just below each oi the aforesaid iigures designating days, and these apertures a register with apertures a2, made in the board B. In connection with the said row of figures designating the days of the month what I term a computing-strip C is employed. The strip O is of suflicient length to extend from the lowermost aperture a substantially to the lower end of the board and is provided at its upper end with a pin b, eX- tending beyond its rear face, which pin is adapted to enter any of the apertures a in the chart and corresponding apertures in the board B. This computing-strip O is preferably made of thin metal, so that it will lie flat on the chart, and upon its outer face a longitudinal column of 'figures is produced, also representing the days of the month, and these igures, which are spaced apart correspondingly to the figures in the space a, read just the reverse, commencing with l at the top and ending with 31 at the bottom.

With reference to the arrangement of the matter upon the body oi' the chart A, the said chart is shown divided about centrally and transversely by a dotted line X, which line, together with the central space a, divides the matter upon the outer tace of the chart into four panels of practically equal size-namely, an upper left-hand panel D, a lower righthand panel D', a lower left-hand panel D2, and an upper right-hand panel D3. The data upon all of the said panelsare read relatively to the days of the month in the space a and on the computing-strip O, as will be hereinafter described. The panels D and D2 are utilized when time is to be calculated interveningbetween a present date and a past date, while the panels D and D3 are used where information is desired as to time intervening between a present date and a future date. Both panels D and D2 at the left of the chart are headed backward and the panels Dl and D3 to the right of the chart are headed forward.

With reference to the panel D at the upper left-hand portion of the chart, the outer or initial column d contains the abbreviation or name of a current month placed above rigures representing the days thereof and reading consecutively from 3074 at the top to l at the bottom, which are the days of the month of October less one, there being thirtyone days in October. In connection with this column parallel columns d are employed, reading Nov Dec Jan (Fe'b?) (KB/Iain!) -Apr.} {(lwa'y), [(Jun') Jul Aug Sep September is the innermost column of the columns of months, and

lool

IIO

the designations of the months in the columns d and d are in transverse alinement with the ligures in the space a designating the days of the month. Beneath the name ol: each month in the columns d is printed in ligures the number of days reading backward 'from an initial day in the space (t to the same day in the months contained in the said columns d and reading transversely with the said initial day in the space a. In this instance the ligures lor the panels D and D are produced by calculating the number ol days lrom the initial day and month, October' 31, to November 1, and placing the result in the right-hand November column one line below that occupied by the ligure 31. The ligure 2, or the dillierence lirom October 30 to November l, is next placed in the November line. The ligure 3, the time from October 29 to November 1, is next in line, and thus the ligures are produced lor the said column until the time from each day in October to the lirst day in November is shown, the last ligure being 31, which represents the days from October 1 to Noven'iber 1. The next ligures indicate the time from October 1 to November 2, which is thirtytwo days, to the third ol' November, thirtythree days, and in this manner all the days ol November are represented in the column, which now shows as many lines ol ligures as there are days in October and November less one day, making sixty days in all. The ligures in the next column, which in this instance are those lor December, are produced in a similar manner. rllhe ligure 31, with which the December column begins, represents the days trom October 30 to December 1. 32, the next ligure in line, represents the days from October 30 to December 2, and in this manner the ligures lor this column are produced until L61 is reached, and all ol the days of the months from October o() to December 3l are shown. rlhe next ligures in the column shows the time Vfrom October 30 to December 2 and the next to December 3, and so the remaining days are scored, ending at 91. The ligures in the panels D and D are obtained in a similar manner, the number ol" days that intervene between each day in the initial month to the lirst ol' the monthscolumn and then to all the days ol: the month are shown as before. ln this instance one day less than the whole number ol days is counted in consequence oli the custom in some communities to reckon the beginning and ending days on one day, while in other communities they are counted as two days. I contemplate incorporating the ligures in my chart in the order adapted to dillerent communities. Further, above each column of months dl a number is printed designating the calendar number of the month expressed in the column beneath, the sequence being backward relative to the initial month exl May column the ligure o pressed in the initial column (l. As, lor example, Octobcr being the initial or current month, September would be designated as 1, August as 2, &c., since the reading obtained trom this panel, as stated, is backward.

The arrangement ol the data in the panel D2 just beneath the said panel l) is identical with the arrangement ol the data in the panel D, except ler the numbers appearing beneath the names oll thc months inthe columns, wherein the initial column, or that contain ing the name or abbreviation olt the current month, designated as di, the other parallel columns being designated as d. ln the arrangement ol the panel Di", which, as stated, is utilized lor working out the mlmber el' days lrom a present date to a Vpast date, the lirst day is expressed by the ligure "1 beneaththel st word or abbreviation "Sep in tbe September column d, which is immediately to the lelt el the central space (t, and lrom this point reading upward in each column. d and in the initial column d2 the ligures elironologically increase until under the word or abbreviation "Oct at the top ol the initial column di: the number 365 appears, extn'essing the total nun'iber ol'V days in a` year.

l desire it to be vum'lerstood that in each and all oit tbe panels on the chart tbc abbreviations ol the names ol the months designating tbe columns are repeated as many times in the columns as may be required.

ln the panel D the outer column d is the initial column, containing the abbreviation` Oct and having produced alitcr each abbreviation a ligure representing a day oil the month, and contrary to the eorrespomling arrangenrent` in the panel D the ligures in the column d elE the panel D read `l'rom l at the top consecutively to the bottom. 'l`be parallel month-columns di are also arranged in reverse order, since the column lor November is tbe innermost column and the other montincolunms read in regular order to the outer right-hand or initial column d, tbe text montti-column thereto being the September column. 'lhe ligures below the names el each month in each column are obtained in the same manner as tbe tigures appearing upon the panel D, but read in reverse order that is, Alrom tbe top ol' tbe eolumn dcwnwardand the chronological sequence is in the direct or calendar order ol months.

At the right and le'lit. tand sides ol the space (t a series ol ligures produced, one above each vertical column, and these ligures are to indicate tbe calendar months Yl'rom any given day in` the initial month ol' October to a like date in any other month. 'lo illustrate, to lind the number ol'A calendar months vl'rom October 29 tro May 2S above the is written, show- ICC IIS

ing it to be ive calendar months, or from Oc* tober 28 to March 2S forward above the March column the figure 5 is to indicate the calendar months between these two latter dates; but I do not speciiically claim the calculations of the calendar months, as the calculations are obtained by days.

With reference to the upper right-.hand panel D3 in the October chart the month-column next to the space a is November instead of September, since this panel is used in calculating time intervening between a present and a future date, and the month-columns d read in calendar order to the right-hand ini tial October column (Z7. The numbers beneath each abbreviation of the name of a month in each column of the said panel read chronologically from 1 to 365 from the tops of the columns downward, 1 being at the head of the November column and 365 at the foot of the initial or October column. It may be here set forth that the initial column d in the panel D and the corresponding initial column d4 in the panel D may be terme( columns of odd days, since they show only the time from dates to dates in the initial months and never contain the full number of days of the month.

In the explanation of the operation let it be supposed that the present date is October 15. The pin of the computing-strip O is placed in the aperture just below 15 in the days-column in the space a, the figure 15 appearing above the strip, as illustrated. Now to iind how many d ays measure back to January 10, begin with the figure 10 on the computing-strip and follow to the left along the transverse line of months and figures registering with said figure 10 until the January column is reached. Now look immediately below the word January on the said transverse line and the figures 278 will be read, thus showing that it is two hundred and seventy-eight days back to January 10.

To obtain the time from the 12th day of March to the 15th day of October, iind 12 on the computing-strip, following to the left alining row of months and numbers until the March column is reached, and immediately below the word "March on the said transverse line the igures 217 will be seen, thus showing that it is two hundred and seventeen days from the 12th day of March to the 15th day of October. Now, for example, iind the time back to November 25 from October 15. Begin at 25 on the computing-strip and trace transversely to the left until the November column is reached, and immediately below the word November in the alining row of months 324 is seen, being the number of days back from October 15 to November 25. In order to ind the days to a given future time, the operation is the same, except that the alining rows of months and figuresrare traced to the right.

If it is desired to know how far it is to October 31 from the present 15th of October, begin at 31 on the computing-strip O and trace transversely to the right until the October column is reached, and the figures 16 immediately below the October in alinement is the answer in days, or, following the line of months and iigures to the left registering with the igure 31 on the computting-strip O until the October column is reached, I find immediately below the October in alinement the figure 349, which is the number of days from October 15 back to October 31.

In the column of figures upon the computing-strip O over the figure 28 I contemplate printing the warning February has only 28 days, and over the figure 30 that April, June, September, and November have thirty days only. The iigures indi- `eating the number of days on the twelve leaves of this chart occupying in each instance nearly the same place, their location is soon learned and readily found. For example, I wish to find the maturity date of a note given October 15 for thirty days. By looking down the Jfirst line of months to the right of the working column I discover the iigure 30" under the word November and in alinement to the left on strip C is the iigure 14, and I thus learn that the note matures November the 14th, or, if three days of grace are to be added, then on the 17th, or, for a similar example, a note dated October 15,

to run one hundred and twenty-ive days, in

the February column I discover 125, above which is the word February and in alinement on the strip O is the iigure 17, and I perceive the note matures on the 17th of February.

To further illustrate, let it be supposed that the present date is October 30. The pin of the computing-strip O is placed in the aperture just below 30 in the days column in the space a. Now to ind how many days it is back to October 1, begin with the figure 1 on the computing-strip O and follow to the left along the transverse line of months and figures registering with said figure 1 until October is reached, and beneath the word October in said column is the figure 29, being` the number of days from October 30 back to October 1, or, for another example, beginning with the 'figure "30 on the strip C and going to the right along the transverse line of months and iigures until October is reached, and beneath the word October in said column is the iigure 365, showing it to be one year from October 30 to the next 30th day of October; or to,follow in the same manner to the left from 30 on the strip O until October is IOO r ro

reached, and beneath the word Qctober is the ligure 365, showing it to be one year back to the last past October 30, or, beginning at 31 on the strip C and following in the same manner along the transverse line ot months and tigures to the right until t( October is reached, and beneath the word October in said column is the'iigure l, showing it to be one day :trom October 3() to tictober 31. For example, i wish to lind the maturity date of a note o'l the present date given tor thirty days. l discover "30 in the manner and space as in the previous illustration, but to the right, Vupon the computingstrip C. l also perceive that with the change et date from October i5 to the present supposed date October 2:30, the ligure upon the said strip has also cerrespomlingly changed and the ligure new in line is 29, and l thus perceive that a note dated October Bt), lor thirty days will mature November I also 'lind 90 7 under January"7 in the January column, and to the lett I i'ind 2S upon the strip (l, and thus .lf lind that a note ot present date tor ninety days would be due January 28, or, if three days grace are to be added, then on January Si.

1t may be here remarked that in many interest-calculating books employed in commercial houses the interest is reckoned by days and months ot thirl y days each, while in other interest-books much used in the commercial world interest is calculated by days only. `With a view to making the calendarchart useful for both systems l have given the time in days only; but the days may be reduced to months and days according to any system thatmay be desired and the answers so written. l contemplate the .adaptation ot the chart to both metl'iods `for indicating totals.

lt will be observed that in the columns of mon hs to the right ot the working space a the name ol that month is repeated in tl'is column as many times as there are days in the initial month, which in this instamfe is October, less one day together with the total number et days in t succeeding' month ot November, making sixty repetitions ot the word November in this column, or the thirty-(mc days olE October less one day, maliing thirty to add to 'the 'twent feig"izt` days in lfebruary, making'lit y-eight repetitions ol the word lleln'uary in the FebruarwV column.

Having thus described my invention, l claim as new and desire to secure by VLetters Patentvlk A calender chart int-ving a series ot panels arrangedy one above tite ot her, two to the right and. two to tly e lett and a space dividing the righ -hand l'rom tne lett-hand panels the said space having a longitudinal row oi' Vligures representing` days ol.l a month produced thereon, each panel consisting of longitudinal and parallel columns olnames ot th e months, the outer columns expressing the name olt `the current month, and chronologically-arrange d ligures appearing beneath the names ol: the months, each panel having' an independent arrangement ot 'ligures, and a computing-strip adapted for attachment to the chart at any point in the row of ligures in the said separaling-space, the said strip having thereon a row of 'ligures representing the days ot a month but arranged in reverse order to the row olt corresponding 'ligurcs in the said separating-space, the ligures in said separating-spac i and on said strip being read in connection with the names oi: the months and the ligures on the columns olZ said panels.

2. A calendarchart havingl a series ol panels arranged one above the other, two to right and two to the lett, the panels to the t and to ine left being' divided by a sepaig-silnrce, in which space at its upper portion a row oliiie'u'i'es is produced representing the days oll lne month and reading down- Yard from the greatest to the smallest number, each olz the said panels coim i'ising parallel columns and each column consisting olI a series ot the name oli a month in the year, the outerniost column ot each panel bearing the `name ol" the current month, nd 'ligures which appear below eaeh name in each colun'nx, said `ligures being clrronologically arranged, the ligures in the right-hand panel reading in one (.lirection and the ligures in the lelthand 'panel raiding in an opposite direction, each column being headed L a numeral representing the calendar-number ol: the month. represented by thecolunm, anda continuingstrip having a row et figures thereon representing the days oi a month7 the said `ligures reading from top to bottom ot the strip or in reverse order to the reading ol' the ligures in the said. separating-space, and means Vtor adjustably securing the said separatiiig-strip at a point below any one olf the iligures produced on the said separating-space.

3. A calendarchart having a series ol panels produced thereon, tour in number and arranged one above the other, two to the right and two to the lett. the right and lelt hand panels being provided with a longitudinal separating-space in which space at its upper portion a row ot ligures is produced representing t he days ot the month and reading downward from the greater number to the lxsser number, each ot said panels comprising a series olz parallel columns, each column bearing the repetition ot the name olI a given month, the outeri'nost colunm ol' each panelbearing the repetition ol: the name olt the current month, ligures at the top ol'A said columns designating the caleiular-munber ol' the several months in the columns, muubers chronologically arranged and 'representing days ot the year, produced one number be neath each repeated name in each column et the panels, the arrangement of the names of the months in the left-hand panels being the same; and the arrangement of the names of the months in the right-hand panels being in corresponding order, the numbers below the names of the columns being chronologically arranged in each panel from 1 to 365, the reading of the numbers in the upper lefthand panel commencing with 1 at the bottom oir' the outer column, the arrangementof the numbers in the lower right-hand panel commencing with l at the t0 of the outer column, the arrangement oftlib numbers on the lower left-hand panel commencing with 1 at the bottom of the inner column and the arrangement of the numbers in the upper 

